System of electric lighting



(No Model.)

B. J. HODGSON 82; J. W. STEARNS, Jr. SYSTEM OF ELECTRIC LIGHTING.

No. 463,793. Patented Nov. 24, 1891.

V A5"- 8 .7 5 0/4; 40% \wg I dad-2 24 /7 WITNESSES Arm/ME UNITED STATESPATENT OFFICE.

EDGAR J. HODGSON AND JOEL \V. S EARNS, JR, OF DENVER, COLORADO.

SYSTEM OF ELECTRIC LIGHTING.

SPECIFICATION forming part of Letters PatentNO. 463,793, dated November24, 1891.

Application filed February 28, 1891. Serial No. 383,156. (No model.)

To aZZ whom, it may concern: generally, 13 the locking-bolt, and 1a theBe it known that we, EDGAR J. lloDdsoN striking-plate secured to thecasing. and JOEL 1V. STEARNS, J r., citizens of the Located withintheframe and in an opening United States of America, residing at Denver,forming a continuation of the bolt-socket 15 is 5 in the county ofArapahoe and State of Coloacylindricalshell16,providedwithasolid baserado,haveinvented certain newand usefullm- 19, both formed of suitableinsulating mateprovements in Systems of Electric Lighting; rial. Theopening for the reception of these and we do declare the following to bea full, parts is formed by turning into the casing, clear, and exactdescription of the invention, and is therefore cylindrical to correspond10 such as will enable others skilled in the art to with the shape ofthe parts. This shell is which it appertains to make and use the same,threaded, as shown at 17, whereby it may be referencebeinghadtotheaccompanyingdrawscrewed into the socket formed for its recepings, andto the figures of reference marked tion, thus affording an easy andconvenient thereon, which form a part of this speciflcameans ofinserting and removing the shell, 15 ion. the extremity of which isprovided with a Ourinvention relates toanimproved method groove 18,permitting the use of a screwof controlling the electric current by thedriver of suitable shape. The base 19 is sepashooting or withdrawing ofa locking-bolt, rate from the shell and forms a seat for a whereby themaking and breaking of the circoil-spring 20, located in the chamber 21of 20 cuit are effected. the shell and engaged in front by a sort of Theobject of this invention is to prevent piston or plunger 22, providedwith a stem the burning of the electric lamps in a room 23, normallyprojecting from the shell into in cases where, by inadvertence ormistake, the bolt-socket. The plunger, like the shell, the occupant hasleft his room without turnis composed of suitable insulating material.25 ing 011 the lamps. Screwed upon stem 23 and engaging head Thisapplication of the invention is very is a ring 24, composed of copper orother extensive, since it includes its use in hotels, material forming agood conductor of the boarding-houses, &c., where the loss byreaelectric current. Extending through the shell son of the guestscarelessly leaving the lamps 16 and base 19 on diametrically opposite oburning in their rooms during their absence sides of the chamber 21 areapertures in is very great. which are located copper or other suitableIn the accompanying drawings is illusmetal plates 25, which at the rearextremity trated an appliance for carrying out or pracof the base areflanged to contact therewith 8 5 ticing the invention. and secured inplace by screws 26, to which 3 5 Figure 1 is a longitudinal section ofthe apare attached the circuit-wires 27 and 28. The pliance located inthe casing or jamb of the forward extremities of plates 25 are flangeddoor adjacent to the lock, which is shown in to contact with metal rings21. Plates 25 dotted lines. Fig. 2 is an enlarged longitudiconnect theshell and base together, so that nal section of the appliance, shown inconthey constitute a symmetrical body of con- 0 nection with thelocking-bolt. Fig. 3 is an venient size and easily handled and attachedelevation of the appliance alone and on the as if they were formedintegral and constisame scale as shown in Fig. 1. Fig. 1 is a tuted buta single part. front end elevation of the appliance or a view Themechanism located within the shell is 5 looking in the directionindicated by arrow protected and concealed in front by a cir- 5 a inFig. 2. Fig. 5 is a rear end elevation or cumferential flange 16, formedintegral with a view looking in the direction indicated by the shell,surrounding stem 23, and in contact arrow 1) in Fig. 2. Fig. 6 is atransverse secwith plates 25. It will thus be seen that when tion takenon the line as on, Fig. 2. ring 2-i is in contact with plates 25 theelec- In the views, wherein similar refercncetric circuit is completedthrough the medium 50 characters indicate corresponding parts or ofthese parts, and that when the plunger is elements of the mechanism, letthe numeral pressed backward to the position i di t 10 designate a door,11 the frame, 12 the lock in Fig. 1 and by dotted lines in Fig. 2 thecircuit is broken. Supposing wires 27 and 28 are connected with thelamps in a room, the shooting of the bolt 13in locking the door forcesthe plunger to the position indicated in Fig. 1 and by the dotted linesin Fig. 2 breaks the circuit and extinguishes the lights. It will thusbe seen that by the use of the appliance illustrated in the drawings ourimproved method of controlling the electric current may be carried outor practiced.

It is supposed that in shooting the lockingbolt it will be done from theoutside of the door by turning the key in the usual way. As soon as thedoor is unlocked or the boltwithdrawn ring 24: is returned to contactwith the plates 25 and the circuit again established, the lights in theroom being turned on.

The fastening of the door from the inside may be by a sliding bolt or byanother keyactuated bolt manipulated through another key-hole. Thesethings are matters of detail which may be regulated according to therequirements of each particular case.

It will be readily seen that the appliance could be easily arranged sothat the shooting of the bolt could make the contact and the withdrawingof the bolt break the contact! simply by reversing the mechanismheretofore described. Ilence \Vhat we claim is 1. In anelectric-lighting circuit, the combin ation of lamps located in aroomcontrolled and operated by means of a cut-out located in proximity tothe lock of a door leading into said room, said cut-out adapted to beoperated by the mechanism of said lock, whereby the burning of thelights is controlled, substantially as described.

2. In a circuit-closer, the combination of a cylindrical casin g ofinsulating material and circuit-terminals in said casing throughout itslength, flanged 011 the ends to embrace the stem of an insulatedspring-pressed plunger working in said casing, and carrying aconducting-ring for bridging the terminals when the plunger is pressedto the extremity of its stroke, substantially as described.

In testimony whereof we affix our signatures in presence of twowitnesses.

EDGAR J. IIODGSON. JOEL IV. STEARNS, JR. Witnesses:

WM. MoCoNNELL, F. 11. JoHNsoN.

